Claire B. (Pfeffer) Rosenberg, 90, of West Hartford, formerly of Fairfield, died Oct. 4. She was the widow of Louis Rosenberg. Born in Newark, N.J., she was the daughter of the late Sol and Ruth (Plaine) Pfeffer. She was a member of Congregation B’nai Israel in Bridgeport and later of Congregation Beth Israel in West Hartford. She is survived by her children, Judith Rosenberg and Ellen Retelle, Stuart and Susan Rosenberg, and David and Amy Rosenberg; her grandchildren, Jessica Rosenberg-Pratt, Lydia Rosenberg, Max and Ossi Rosenberg; and her great-grandchildren, Zohar and Asher Rosenberg. She was also predeceased by her longtime companion, Dr. Michael Tartakovsky.